GRAVITY FLOW SPOOL VALVE

摘要

Disclosed is a gravity flow spool valve for dispensing small volumes of liquid. The valve comprises an elongated hollow housing and a piston adapted to move within the interior of the housing. The piston has a first and second spool, spaced from each other using a coupling rod. The piston is coupled to an activation button which moves the piston from a dispense position to an intake position. In the intake position, the second spool is moved past a series of intake holes in the housing and fluid surrounding the holes flows into the chamber defined between the interior surface of the housing, the first spool and the second spool. When in the dispense position, the chamber is in communication with a spout and a ventilation hole which allows the fluid contained within the chamber to flow out the spout. One application of the valve is dispensing perfume samples.

主权项

1. A valve for dispensing small volumes of liquid comprising:
a hollow elongated sleeve having a first end and a second end; a spout coupled to the housing at the first end and at least one intake hole through the housing at the second end thereof; a piston having a first spool and a second spool spaced a fixed distance from each other via a connecting rod; said first spool and said second spool adapted to be moveable within and be in sealing engagement with an interior wall of the said housing; said first spool, said second spool and said interior wall of said housing define a chamber there between; and an activation apparatus coupled to said piston to move said piston between an intake position and a dispense position; wherein when said piston is in the intake position, said chamber is in communication with said at least one intake hole and isolated from said spout and said ventilation hole to allow the flow of fluid surrounding the at least one intake hole to enter the chamber; and when said piston is moved to said dispense position, said chamber is in communication with said spout and ventilation holes and isolated from said at least one intake hole to allow the fluid within the chamber to flow out the spout.